Workholder



March 1931- B. T. BQRDEN 1,797,541

WORKHOLDERQ Filed Jan. 50 1928 2 Sheets-Sheet l gwuwntov March 24, 1931. B. T. BORDEN WORKHOLDER Filed Jan. 30; 192 2 Sheets-Sheet 2 B a a fo 71/1270 a a e77 FIG.6

Patented Mar. 24, 1931 UNITED STATES arent m SIGNMENTS, 'I O OHIO I THE Bonn-En COMPANY, on WAnREn-on-mn coRPoRATnIon, or

wonxnorinnn.

' Application'fllediranuary 30, 1928. Seria1lN0. 250',617.

My invention relates to improvements in work holders generallyand more particularly to such as. are used'in connection with die stocks and the like for holding pipe and rods. 1

Briefly stated, the invention has for its primary object to provide a work holder wherebyv the pipe-orother work can be quickly and accurately centered with 1 respectvto the dies or other tools and rigidly locked in place."

Another object ofthe'invention is the provision of a device of this kind including novel cooperating locking and gripping elements incorporatingmeans. for facilitating the adjustment' for the different standard sizes-of work.

Aistilli further and more specific object of theinvention is to furnish a work holder which ischaracterized by abody portion having. a largeicentral hole-, -the body having a plurality of circumferentiallyspaced radial bosses communicating with said hole, the bosses being tapped to receive threaded-workengaging shanks, and. rotatably mounted abutments which may he -turned to r variably cooperate with therear portions-of theshanks whereby the proper setting for diiferentsized pipesor other-work maybe readily arrived at. Other objects andradvantages reside in the construction, combination, and mode of operation of the various parts,and will be readily understood?andiappreciated by those skilled in the art as the description proceeds,reference being had to the accompanying drawings which illustrate several preferred embodiments of the invention. In the drawings,

Figure 1 is atop plan view of a work holder incorporatingmy invention; I

Figure 2 is a section on the line 2-2 of Figure 1; p

Figure 3 is a view-partly in planand partly in longitudinal sectionrof a further modified form of the invention;

Figure 4 is a group perspective of parts shown in Figure 3 with the head of the screw removed from the shank;

Figure 5 is an enlarged developed sectional 50 View of the head of the screw, and

Figur'e 6 is an elevation-of the device show n in =Figure3l Referring specifically t'o= the drawings wherein the same'reference' charactersjhave been usecli to'- designate the same parts throughoutthe work holder of Figures 1 and 2 comprisesabody -l having 'adarge central hole 2. Circumferentiallyspaced radial bosses 3 are formed integral "with the body at the margin of hole 2, these bossesbein tapped to receive the thread'ed portions 0 work-engagingshankse i The outer ends of the shanks l a-re provided with knurled heads 5' to facilitate turning of the same and are also preferably" provided with transverse holes 6 to" receive a turning pin or lever. 'Desc-ription of one shank as sembly will suffice for all; I

In the form of'the inventionshownthe iinthreaded endiof theshank has secured at its outer end an externally k nurled annular liead 60, the inner end of which is' provided witli-a circumferential series of equallyspac'ed holes 61. Diametrica'lly opposite ones of such holes 61' are of equal predetermined depth as shown diagrammatically in Figure f and. such pairs are adaptedto receive the ends of pins 52 tightly. fitted in holes 51 in the-ope posed'face of an annulus 50. The difie'r'ent pairs of holes-are of difl'erent depth and 'the bottom surfaces of such p'airs thus consti tute steps cooperating. with the abutment formedby tl'lQ'PlIlS 62 and annulus-5'O." The internal surface of 'annulusisunthreaded and is of such a diameter that it-can slide'ov'er 1 Figure 6 opposite one or both of the holes of each diametrically opposite pair.

In the embodiment of the invention herein described there are preferably two of the setting shanks, although there may, of course be more. In addition, I preferably employ at least one clamping shank as at &0 (Fig. 1) This has a pivoted hand lever 41.

In use the shanks 4 are screwed outwardly a suflicient'distance to free the pins 52 from the sockets 61;"then, if the shank is to be set for a different size, the collar is turned until its pins occupy the desired sockets; then the shank is turned in until the inner face of the collar 50 abuts the boss 3 of the annular frame, and this insures the shank being in proper position for the selected size of pipe. With the two shanks 4 thus positioned, the pipe is clamped by screwing in the shank 40 until there is a firm engagement with the ends of the three shanks;

The described embodiment is simple and inexpensive of manufacture, and has the advantage of being adapted to both standard and odd sized work.

Having'thus described my invention, what I claim asnew and desire to secure by Letters Patent is:

1. Ina work holder, a body, a threaded shank threaded t-hereinto and having a head at its outer end, an adjustable stop on said shank and having opposed rearwardly extending pins, and said head having a circumferential series of surface recesses to receive said pins, said recesses being of different depths and opposed ones of the same being of the same depth.

2-.The combination of a body, a shank movable thereinto, and a variable stopping device comprising two mutually engageable members one of which is an abutmentand the other of which is a shoulder on the shank, one of said members having a plurality of laterally positioned steps of different height,

one of said members being mounted to turn to select a different step for engagement.

4.-. The combination of an annular body, a radial screw threaded therein and having a head, an abutment bearing against the body and mountedto turn about an axis, the head and abutment cooperating and one of them having a series of steps arranged in a cir cuit about its axis, whereby by turning the abutment a diiferent step may be selected and a different limit for the screw thus provided.

5. The combination of a body, a screw threaded therein and provided with a head,

a rotatable abutment between the head and through the boss and body and having its axis at right angles to the face of the boss, a rotatable abutment bearing against such face of the boss and having its axis at right angles thereto, a head on the screw, said head and abutment cooperating and one of them being provided with a set of steps any one of which the other may engage according to the angular position of the abutment relative to its axis.

' 7. The combination of a body, a shank threaded thereinto, and a variable stopping device comprising two mutually engageable members one of which is an abutment rotatably surrounding the shank and the other of which is a shoulder on the shank, one of said members having a plurality of laterally positioned steps of different height, whereby the inward movement of the shank may be variably limited according to the angular )osition of the surrounding member relative to the shank.

8.. The combination of an annular body, a radial screw threaded therein and having a head, a rotatable abutment freely surrounding the screw and bearing against the body, the head and abutment cooperating and one of them having a series of steps which the other may selectively engage, said series extending in a circuit about the axis of the screw.

9. The combination of an annular body having an external boss, a screw threaded through the boss and body and having its axis at right angles to the face of the boss, a rotatable abutment freely surrounding the screw bearing against such face of the boss, a head on the screw, said head and abutment cooperating and one of them being provided with a series of steps any one of which the other may engage according to the angular position of the abutment. I

. In testimony whereof I a'flix my signature.

BRADFORD T. BORDEN. 

